Pointer glued doing an action on a palette.

Merged

Please see the video attached. I’m painting with the brush. After doing an action on a palette (choose a layer, change brush, or move the color sliders like in this video) what I was moving becomes glued to the pointer.

Clicking somewhere the brush returns to work normally but this is a very annoying problem.

This rarely happened until the CC2015 version, it worsened with CC2017 and with the current version CC2018 (19.1) it’s a disaster.

It happens both on Mac pro and on Macbook air with El capitan. I have tried all the Wacom drivers available but it does not seem to change anything, I'm on a Intuos Pro. Any suggestions? Thank you.